Nathaniel Littlefield (September 20, 1804 – August 15, 1882) was a United States representative from Maine.

Nathaniel Swett Littlefield was born in Wells, Massachusetts (now in Maine) on September 20, 1804.

He attended the common schools, studied law, was admitted to the bar in 1827 and commenced practice in Bridgton.

Littlefield was elected a member of the Maine House of Representatives in 1854, and was a delegate to the 1866 National Union Convention in Philadelphia.

Littlefield's efforts culminated in an 1835 attack on a meeting held in the old town hall, for which he was fined $25 by the court of Common Pleas.